Finding a Key for My Clock

The easiest way to find the proper key is to bring the clock in to a local clock shop.  A good repair shop should have a selection of key in stock and can probably supply the key you need.  If you are near Mount Vernon, WA, you are welcome to bring the clock into my shop.  You can also use the American Watchmakers – Clockmakers Institute website, https://members.awci.com/AWCIWEB/AWCISearch/MemberSearch.aspx, to find a repair center near you.
Some people do not have a repair shop within a reasonable distance from them.  In that case you can order a key yourself.  Use a pair of calipers to measure the small timekeeping adjustment arbor and also the winding arbors (in millimeters).  Harbor Freight has a cheap pair of digital calipers that will work just fine for this purpose.  Once you have the required measurements, you can search for the appropriately sized double ended key on one of the clock supply websites.  Ronell Clocks, Timesavers, and Merritt’s Antiques all carry double ended clock keys.  Be aware that the stated sizes of the keys and the size you measure on the arbor may be slightly different, so you may need to order more than one key to get one that fits.  Fortunately, they are relatively cheap.  Your key should slide easily onto the arbor, but not so loose that either the key or the corners of the winding arbor can be damaged when you turn the key.  Good luck!